Key legal question
Whether the cantonal court could increase provisional maintenance under Art. 137 CC based on higher income alone.
Extracted holding
No. A change in income justifies modification only if the increased support is shown to be necessary to cover the child’s needs and to maintain the spouse’s marital standard of living.
Extracted reasoning
In favorable financial situations, maintenance is limited by the costs of maintaining the prior marital lifestyle. The spouse seeking more maintenance must plead and make plausible the relevant expenses and the need for an increase. The record contained no quantified lifestyle expenses or plausible allegation of such need.